Calculators that respond to their environment. All of the financial calculators here at CalcXML have been designed following responsive web design principles, adapting to the size of the screen on which they are displayed. From the smallest cell phone to the largest desktop monitor, all of your web visitors will be happy with these financial calculators.
Dichlorodiphenyltrichloroethane (DDT) Dichlorodiphenyltrichloroethane (DDT) is an insecticide used in agriculture. The United States banned the use of DDT in 1972, but some countries still use the chemical.
DDT was the first insecticide that proved effective in controlling  the boll weevil. However it was banned and other insecticide were  used, but they too caused problems andâ¦ were expensive. Nowadays,  parasitic wasps and specialized bacteria and viruses are used for  control with considerable success.